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Hydrothermal-induced growth of Ca10V6O25 crystals with various morphologies in a strong basic medium at different temperatures

Hojamberdiev, Mirabbos ; Bozgeyik, Mehmet S. ; Abdullah, Aboubakr M. ; Bekheet, Maged F. ; Zhu, Gangqiang ; Yan, Yinglin ; Xu, Yunhua ; Okada, Kiyoshi (2013):
Hydrothermal-induced growth of Ca10V6O25 crystals with various morphologies in a strong basic medium at different temperatures.
In: Materials Research Bulletin, 48 (4), pp. 1388-1396. Elsevier Science Publishing, ISSN 00255408,
[Article]

Abstract

The Ca10V6O25 crystals with various morphologies were synthesized by a facile hydrothermal method in a strong basic medium. The effects of the pH of synthesizing solution, hydrothermal reaction temperature and time on the morphology and crystallinity of Ca10V6O25 powders were investigated. The as-synthesized powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–vis spectrophotometer and vibrating sample magnetometer. The experimental results demonstrate that phase-pure Ca10V6O25 powders could be hydrothermally obtained at temperatures ranging from 120 °C to 180 °C for 12–48 h with the pH ≥ 12.5 of synthesizing solution. The morphology of Ca10V6O25 powders was strongly dependent on the synthesis parameters, such as pH, temperature and time. The Ca10V6O25 microspheres were obtained at 180 °C for 48 h with the pH = 12.5 of synthesizing solution. The UV–vis diffuse reflectance spectra have shown that the Ca10V6O25 powders efficiently absorb UV light with an absorption edge at about 380 nm. All the samples noticeably exhibit a superparamagnetic behavior with a nearly zero magnetic remanence (remanent magnetization). The hydrothermally synthesized Ca10V6O25 powders may be employed as a potential candidate in novel electronic and biomedical applications.

Item Type: Article
Erschienen: 2013
Creators: Hojamberdiev, Mirabbos ; Bozgeyik, Mehmet S. ; Abdullah, Aboubakr M. ; Bekheet, Maged F. ; Zhu, Gangqiang ; Yan, Yinglin ; Xu, Yunhua ; Okada, Kiyoshi
Title: Hydrothermal-induced growth of Ca10V6O25 crystals with various morphologies in a strong basic medium at different temperatures
Language: English
Abstract:

The Ca10V6O25 crystals with various morphologies were synthesized by a facile hydrothermal method in a strong basic medium. The effects of the pH of synthesizing solution, hydrothermal reaction temperature and time on the morphology and crystallinity of Ca10V6O25 powders were investigated. The as-synthesized powders were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV–vis spectrophotometer and vibrating sample magnetometer. The experimental results demonstrate that phase-pure Ca10V6O25 powders could be hydrothermally obtained at temperatures ranging from 120 °C to 180 °C for 12–48 h with the pH ≥ 12.5 of synthesizing solution. The morphology of Ca10V6O25 powders was strongly dependent on the synthesis parameters, such as pH, temperature and time. The Ca10V6O25 microspheres were obtained at 180 °C for 48 h with the pH = 12.5 of synthesizing solution. The UV–vis diffuse reflectance spectra have shown that the Ca10V6O25 powders efficiently absorb UV light with an absorption edge at about 380 nm. All the samples noticeably exhibit a superparamagnetic behavior with a nearly zero magnetic remanence (remanent magnetization). The hydrothermally synthesized Ca10V6O25 powders may be employed as a potential candidate in novel electronic and biomedical applications.

Journal or Publication Title: Materials Research Bulletin
Journal volume: 48
Number: 4
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Inorganic compounds, Chemical synthesis, Electron microscopy, X-ray diffraction, Magnetic properties
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 04 Feb 2014 09:20
Official URL: http://dx.doi.org/10.1016/j.materresbull.2012.12.015
Identification Number: doi:10.1016/j.materresbull.2012.12.015
Funders: MH would like to thank the Japan Society for the Promotion of Science (JSPS) for the financial support.
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